Abstract: The present invention relates to a domestic appliance, in particular a cooking oven, comprising at least one illumination device (10) and at least one cooling channel (30). The cooling channel (30) includes an elongated portion extending inside a wall (12) of a cavity (14) of the domestic appliance. An inner sheet (28) of said wall (12) faces the cavity (14). The cooling channel (30) is connected or connectable to at least one fan (44; 46) for generating an air stream (32, 34, 36) inside said cooling channel (30). The illumination device (10) is provided for illuminating the cavity (14) of the domestic appliance and comprises at least one LED board (16) and at least one transparent panel (18, 20). At least one light emitting diode (22) is arranged at an inner side of the LED board (16) and directed to the cavity (14). A transparent inner panel (20) of the illumination device (10) faces the cavity (14) and is arranged in a cut-out of the inner sheet (28) of the wall (12).